package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.ParamMissException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategorySerciceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    public PageResult findPage(CategoryPageQueryDTO pageQuery) {
        PageHelper.startPage(pageQuery.getPage(),pageQuery.getPageSize());

        if (StringUtils.isNotBlank(pageQuery.getName())){
            pageQuery.setName("%"+pageQuery.getName()+"%");
        }
        Page<Category> categoryPage=categoryMapper.findPage(pageQuery);

        long total = categoryPage.getTotal();
        List<Category> result = categoryPage.getResult();

        return new PageResult(total,result);
    }

    @Override
    public int insertCategory(CategoryDTO categoryDTO) throws ParamMissException {
        if (StringUtils.isBlank(categoryDTO.getName())){
            throw new ParamMissException("传入参数缺失！");
        }

        Category targetEmp = new Category();
        BeanUtils.copyProperties(categoryDTO,targetEmp);

        targetEmp.setStatus(StatusConstant.ENABLE);
        targetEmp.setCreateTime(LocalDateTime.now());

        Long empId = BaseContext.getCurrentId();
        targetEmp.setCreateUser(empId);
        targetEmp.setUpdateTime(LocalDateTime.now());
        targetEmp.setUpdateUser(empId);

        int i=categoryMapper.insertCategory(targetEmp);

        return i;
    }
        /**

         - 根据id删除分类
         - @param id
         */
        public void deleteById(Long id) {
        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
            Integer count = dishMapper.countByCategoryId(id);
            if(count > 0){
                //当前分类下有菜品，不能删除
                throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
            }
            //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
            count = setmealMapper.countByCategoryId(id);
            if(count > 0){
                //当前分类下有菜品，不能删除
                throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
            }
            //删除分类数据
            categoryMapper.deleteById(id);
        }

        /**

         - 修改分类
         - @param categoryDTO
         */
        public void update(CategoryDTO categoryDTO) {
            Category category = new Category();
            BeanUtils.copyProperties(categoryDTO,category);
            //设置修改时间、修改人
            category.setUpdateTime(LocalDateTime.now());
            category.setUpdateUser(BaseContext.getCurrentId());
            categoryMapper.update(category);
        }

        /**

         - 启用、禁用分类
         - @param status
         - @param id
         */
        public void startOrStop(Integer status, Long id) {
            Category category = Category.builder()
                    .id(id)
                    .status(status)
                    .updateTime(LocalDateTime.now())
                    .updateUser(BaseContext.getCurrentId())
                    .build();
            categoryMapper.update(category);
        }

        /**

         - 根据类型查询分类
         - @param type
         - @return
         */
        public List<Category> list(Integer type) {
            List<Category> list = categoryMapper.list(type);
            return list;
        }

}
